Re: Distributed spam-based DoS in progress

[Valdis.Kletnieks () vt edu]

On Tue, 18 Feb 2003 07:48:20 +0100, Hugo van der Kooij <hvdkooij () vanderkooij org>  said:
> Pardon me for noting that your mailserver seems to be broken.
>
> If a message is undeliverable it will be bounced BUT if the bounce message 
> can not be delivered it will be discarded immediatly to prevent double 
> bounce loops.
>
> See also RFC 2821 section 4.5.5

Umm.. you're overlooking the case where you get a message, have to bounce it,
and the other end doesn't answer a SYN on port 25, so you have to sit on
it for several days before the message times out.....

So yes, the message *will* be discarded immediately - 5 days from now. ;)
-- 
                                Valdis Kletnieks
                                Computer Systems Senior Engineer
                                Virginia Tech

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